udacity login
Adding udacity login.
Merge branch 'chase-zhang'
Fetch codecademy authenticity token for login.
Finished the login handler of codecademy.
Ignore vim swap files.
Merge branch 'tonyseek-codecademy-crawler'
Merge branch 'develop_xiaomo' of github.com:seansay/emuser into develop_xiaomo
添加数据model
重构完codeschool代码
增加时间处理模块
Merge branch 'master' of github.com:seansay/emuser
Merge branch 'master' into develop_xiaomo
Merge branch 'chase_zhang' of github.com:seansay/emuser into chase_zhang

Conflicts:
	.gitignore
	emuser/educations/crawler/udacity.py
Merge branch 'chase_zhang' into develop_xiaomo
短暂测试通过